JULABO FPW91-SL Ultra-Low Refrigerated Circulators - Manual (Page 29)

SL
29
S = Suction pump connection
D = Pressure pump connection
K = Float
H = Height adjustment
The circulator is equipped with both a pressure and suction pump
for external temperature application in open systems.
Differing flow rates of the pressure and suction pumps should be
compensated. To maintain a constant liquid level, the JULABO
„D+S“ Level Adapter is recommended for the external bath tank.
The flow rate of the pressure pump will be then regulated by a
built-in float device. The liquid level may be changed by a height
adjustment on the „D+S“ Level Adapter.
Accessory: „D+S“ Level Adapter Order No. 8 970 410
Important:
L
The liquid level should be equal in the internal and external
baths (absolute height).
L
If you take out samples (for example Erlenmeyer flasks) from
the external bath, turn the circulator off with the Start/Stop key.
Backflow safety device
T16A
T16A
T1.25A
ext
Pt100
SERIAL ALARM REG+
E-PROG
STAND-BY
13
14
(see page 74)
If the liquid levels in the circulator bath and the external
system are at different heights, overflowing must be
prevented after the power has been turned off.
Flood hazard!
For this reason, solenoid valves for loop circuit or shut-off
valves can be integrated in the loop circuit.
L
Connect the valve to the connector (13).
L
If socket (14) is used:
In menu >Inputs/Outputs< set the
menu item >SV-Out< to >Backflow<.
Order No. Description
8 980 701 Set of solenoid valves
for loop circuit up to +100 °C
8 970 456 Shut-off valve (suitable up to +90 °C)
8 970 457 Shut-off valve (suitable up to +200 °C)